JP2002267148A - Exhaust gas disposer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an offensive smell and carbon monoxide from being discharged in large quantity by cooling the combustion partially even if smoke decreases. SOLUTION: This exhaust gas disposer is provided with an exhaust gas treatment section 42 which lets in swirling air and secondarily burns a combustion gas stream 59. Hereby, the exhaust gas treatment section 42 is supplied with air from the blast means 22 of a burner 10, so this can prevent the occurrence of not only smoke but also an offensive smell, carbon monoxide, etc., keeping keep the state of exhaust gas treatment optimum while grasping the state of the interior of a furnace 29 created by the burner 10 and the state of the discharged combustion gas stream 59.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment apparatus for purifying exhaust gas by reduction firing when ceramics are fired at home.

[0002]

2. Description of the Related Art As a conventional exhaust gas treatment apparatus of this type, for example, there has been one disclosed in Japanese Utility Model Laid-Open No. 7-2721. FIG. 8 shows a conventional exhaust gas treatment apparatus described in the above publication.

In FIG. 10, reference numeral 1 denotes a secondary combustion air supply pipe through which air is sent from a motor fan 7, 2 denotes an obliquely upward hole provided so as to discharge air in a spiral shape, and 3 denotes an obliquely upward hole. 4 is a combustion chamber (incineration chamber) in which the chimney 3 communicates with the upper part, 5 is water put around the combustion chamber 4 composed of a double iron plate, and 6 is incineration in the combustion chamber 4. It is a lid to put things in.

[0004]

However, in the above-mentioned conventional structure, the incinerated material in the combustion chamber 4 is ignited to start the combustion. Therefore, the amount and type of the incinerated material are not constant from the beginning, and the spiral shape is not used. It was difficult to match the amount of air burned to the incinerated material at that time, and if a large amount of air was emitted, even if the smoke was reduced, the combustion would be cooled and the odor and carbon monoxide would be emitted in large amounts. .

The present invention solves the above-mentioned conventional problems, and supplies air from a blowing means of a burner to an exhaust gas treatment section to grasp a state of a furnace created by the burner and a state of combustion gas discharged. It is another object of the present invention to keep the exhaust gas treatment state optimal and prevent generation of not only smoke but also odor and carbon monoxide.

[0006]

In order to solve the above-mentioned conventional problems, an exhaust gas treatment apparatus of the present invention is provided with an exhaust passage for exhausting combustion gas of a furnace heated by a burner, and provided in the middle of the exhaust passage. An exhaust gas processing unit is provided with an exhaust gas processing unit configured to supply swirling air to the exhaust gas processing unit for secondary combustion of the combustion gas and to supply air from the blowing means of the burner to the exhaust gas processing unit.

[0007] With this, the burner and the exhaust gas treatment device are linked, and while grasping the state of the combustion furnace created by the burner and the state of the combustion gas discharged, the exhaust gas treatment state is kept optimal, and not only smoke but also odor and Generation of carbon monoxide and the like can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is provided in an exhaust passage for exhausting combustion gas, an exhaust gas processing section for swirling air to flow in and secondary combustion of the combustion gas, and a blowing means for a burner. To supply air to the exhaust gas treatment section from the furnace, keeping the state of the furnace and the state of the combustion gas being exhausted, keeping the exhaust gas treatment state optimal, not only for smoke but also for odor and carbon monoxide. Occurrence can be prevented.

The invention described in claim 2 is particularly advantageous in claim 1.
The exhaust gas treatment unit described in (1) configures a supply unit that varies the amount of swirling air in the middle of a ventilation passage that communicates with the ventilation unit of the burner, thereby expanding the variable width of the ventilation unit and increasing the appropriate air volume. Can be supplied to the exhaust gas treatment section.

[0010] The invention described in claim 3 is particularly advantageous in claim 1.
The exhaust passage described in (1) bends a part of the passage, inserts the swirl tube through the outer wall, and communicates with the air passage, thereby facilitating the insertion of the swirl tube into the exhaust passage and reducing the flow of combustion gas. It can be uniform and promote secondary combustion.

[0011] The invention described in claim 4 is particularly advantageous in claim 1.
By introducing the combustion gas into the exhaust passage in a substantially tangential direction so that the combustion gas swirls upstream of the exhaust gas treatment section, the swirling air and the combustion gas from the swirl cylinder form a uniform flow. Thus, it is possible to quietly perform the exhaust gas treatment while suppressing the disturbance of the secondary combustion.

[0012] The invention described in claim 5 is particularly advantageous in claim 1.
By providing a combustion support cylinder having a plurality of through holes around the swirl cylinder described in the above, by introducing combustion gas inside the combustion support cylinder, the combustion gas discharged from the combustion support cylinder to the flame formed in the swirl cylinder The fuel gas is pushed to cause a recirculation flow flowing again into the combustion support cylinder from the through hole of the combustion support cylinder, and the combustion gas is maintained at a high temperature, so that the secondary combustion can be improved.

[0013] The invention described in claim 6 is particularly advantageous in claim 1.
The exhaust gas processing section described in (1) always allows a predetermined amount of air to flow in, thereby preventing the high-temperature combustion gas from the swirl cylinder from flowing back to the exhaust gas processing apparatus, and preventing the exhaust gas processing apparatus from being damaged.

[0014] The invention described in claim 7 is particularly advantageous in claim 1.
The exhaust gas processing section described in the above, by flowing the same or more air into the combustion gas during stable combustion after the processing of the combustion gas in the furnace is finished, soot adhering around the swirl cylinder It can be removed by burning.

[0015] The invention described in claim 8 is particularly advantageous in claim 1.
By providing a burner ring on the downstream side of the swirl cylinder to reduce the cross-sectional area of the exhaust passage,
The combustion gas is retained in the exhaust passage to increase the temperature in the exhaust passage, so that secondary combustion can be promoted and exhaust gas treatment can be improved.

The invention described in claim 9 is particularly advantageous in claim 1.
The exhaust gas processing unit described in (1) provides a flame spreader plate larger than the outer periphery of the swirl tube at the downstream end of the swirl tube, thereby spreading the flame formed in the swirl tube into the exhaust passage and capturing the combustion gas. As a result, the exhaust gas treatment can be improved.

According to a tenth aspect of the present invention, in particular, the exhaust gas treating section according to the first aspect introduces air from an exhaust gas processing air blowing means provided separately from the air blowing means of the burner, thereby producing a combustion gas. The secondary combustion can be promoted by supplying an appropriate amount of air in response to the state of (1).

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of an exhaust gas treatment apparatus according to Embodiment 1 of the present invention. Figure 1
, 8 is a pulse pump for pumping kerosene, which is a liquid fuel, from a constant oil level device (leveler) 9 to a burner 10.
It is a fuel supply means composed of a cylinder pump, an electromagnetic pump and the like. Reference numeral 11 denotes a tapered rotary atomizing unit to which liquid fuel is supplied from the fuel supply means 8 to the surface thereof via the oil feed pipe 12. The rotary atomizing unit 11 is provided with a disk for shaking off fuel and blades for mixing vaporized gas of fuel with air. Reference numeral 13 denotes a vaporizer provided around the rotary atomizing unit 11, which is made of a heat-resistant material having good heat conductivity, such as aluminum alloys such as aluminum and duralumin, brass, copper, steel, and cast iron, and formed into a cylindrical shape. Have been. A vaporizing air port 15 partially open is provided on a side of the vaporizer 13 so that the oil feed pipe 12 and the shaft 14 of the rotary atomizer 11 are inserted.

On the upstream side of the vaporizing air port 15, an air chamber 16, a blower chamber 17, and an air supply chamber 18 are provided so as to be connected to each other. In addition, the air chamber 16, the blowing chamber 17, and the air supply chamber 18
Each of the spaces constitutes a partitioned space, but they communicate with each other through an opening through which the shaft 14 passes. An air inlet 19 is provided in a part of the air supply chamber 18. Air supply room 18
Is connected to the shaft 14 and penetrates the air chamber 16, the air blowing chamber 17, and the air supply chamber 18. An impeller 21 is provided in the blower chamber 17. As the impeller 21, a turbo fan, a radial fan, or the like capable of outputting a high pressure is used, and the shaft 14 is rotated by the motor 20. The blower chamber 17 and the motor 2
0, the impeller 21 constitutes the blowing means 22.

Reference numeral 23 denotes a cylindrical combustion cylinder provided around the carburetor 18 and is provided in a shape of a convergent tube. Reference numeral 24 denotes a flame port provided at the downstream end of the vaporizer 13 and is made of a heat-resistant material such as steel, iron, titanium, duralumin, or ceramic.
It is formed in a porous shape. 25 is a secondary air port around the bottom of the carburetor 13 and inside the combustion cylinder 23,
A plurality is provided so as to communicate with. Reference numeral 26 denotes an electric heater, which is composed of a heating element such as a nichrome wire or a Kanthal wire cast into the vaporizer 13. 27 is the vaporizer 13
Is a vaporizer temperature detecting section for detecting the temperature of the carburetor, and includes a thermistor, a thermocouple, and the like.

Reference numeral 28 denotes a controller, which is a vaporizer temperature detector 27.
Then, the electric heater 26 is turned on and off from the signal of (1) to maintain the vaporizer 13 at a predetermined temperature. The control unit 28 is provided to control the fuel pump 13 and the impeller 21 in an appropriate state according to the instruction of the operation switch and the magnitude of the load to adjust the fuel and the air.

Reference numeral 29 denotes a tub-shaped furnace in which the tip of the burner 10 is inserted into a fire opening 31 provided near the bottom of the side wall 30. In the furnace 29, the side wall 30 is made of a heat-resistant alumina or silica ceramic or brick. The outside of the side wall 30 is covered with a protective wall 32 made of heat-resistant steel, cast iron, or the like. The upper part of the furnace 29 is provided with a lid-like loading / unloading section 34 for loading and unloading the ceramic work 33. The loading / unloading section 34 is lined with a heat-resistant alumina or silica ceramic or brick, and is entirely assembled with a protective cover 35. The protective cover 35 has a handle for facilitating opening and closing, and a stopper for preventing high-temperature gas from leaking.

Reference numeral 36 denotes a fire inlet 31 on the side wall 30 of the furnace 29.
A high-temperature gas is exhausted to the outside by communicating with the exhaust passage 37 at an exhaust port provided above the air outlet. A swivel cylinder 38 made of a heat-resistant material such as ceramic is inserted into the exhaust passage 37 from outside the exhaust passage 37, and at the tip of the swirl tube 38, air is swirled in a tangential direction around the swirl tube 38. A plurality of turning ports 39 are provided. The turning port 39 is provided for the turning cylinder 3
The peripheral wall member 8 is cut and raised or formed into a projection shape. In order to make the revolving cylinder 38 face the exhaust passage 37, the hermeticity with the outer wall 40 of the exhaust passage 37 is enhanced by using heat-resistant ceramic packing or sealing material.

The air introduction side of the swivel cylinder 38 is connected to an air passage 41.
Through the air chamber 16 of the burner 10. The exhaust passage 37, the swirl cylinder 38 and the air passage 41 constitute an exhaust gas processing unit 42. The exhaust gas processing unit 42 is configured to have a lower airflow resistance than the carburetor 13 and the burner port 24 of the burner 10, so that when the air is supplied by the blowing means 22 of the burner 10, the air flows toward the swirl cylinder 38. It is provided so as to facilitate removal and reduce the number of revolutions of the impeller 21 to increase the proportion of air from the swirl cylinder 38 when the reduction is strengthened, thereby facilitating exhaust gas treatment.

Reference numeral 43 denotes a temperature detector which is installed on the side wall 30 of the furnace 29 and measures the temperature inside the furnace 29. Temperature detector 4
Reference numeral 3 includes a thermistor, a thermocouple, and the like. In response to the value of the temperature detection unit 43, the control unit 28
Then, the impeller 21 is controlled to an appropriate state, fuel and air are adjusted, and the temperature in the furnace 29 is set to a predetermined value.

Reference numeral 44 denotes a fuel tank, which communicates with the constant oil level device 9 via a communication pipe 45. In the fuel tank 44,
It is provided so as to be able to store more fuel than can be fired (oxidation, reduction, etc.) at least once.

Reference numeral 46 denotes an exterior, in which fuel supply means 8 is provided.
The burner 10, the blowing means 22, and the furnace 29 are arranged. The exterior 46 is made of a painted metal plate or stainless steel to prevent corrosion and dirt due to rainwater. The exterior 46 is made with an uneven surface so as to withstand the heavy objects of the burner 10 and the furnace 29.
It is reinforced with a reinforcing plate. 47 is a leg of the exterior 46,
It is provided to maintain stability when installed on the floor or the ground. A space 48 is provided in the exterior 46 around the furnace 29 and the burner 10 so that heat of the furnace 29 and the burner 10 is not transmitted to the exterior 45. Also, the top plate 4 of the exterior 46
9 is provided so that the opening / closing door 50 can be opened and closed so that the loading / unloading section 34 of the furnace 29 can be opened and closed. The opening / closing door 50 is provided with a packing so that rainwater does not fall into the carry-in / carry-out section 34, or provided with the opening / closing door 50 standing up and supporting a part of the exterior 46. The top plate 49 is provided with an exhaust portion 51 to which the exhaust passage 37 communicates. The inside of the exhaust passage 37 and the exhaust portion 51 is made of heat-resistant alumina or silica ceramic or brick, and heat is applied to the exterior 46. It is provided not to be transmitted inside.

An exhaust top 52 is provided at the end of the exhaust section 51, and is configured to disperse high-temperature gas to lower the temperature. The top plate 49 is provided with a supply door 5 for opening and closing a cap 53 for supplying fuel to the fuel tank 44.
4 are provided. The supply door 54 has a cap 5
3 is provided so as not to fall down,
Is provided by supporting a portion of the exterior 46 by standing up. Further, an air supply port 56 communicating with the air intake 19 of the burner 10 is provided in a side portion 55 of the exterior 46.
In addition, the side portion 55 is provided with a galley 57 for cooling the inside of the exterior 46 by convection at an appropriate position. 58 is the flame outlet 24
A flame formed above, 59 is a combustion gas flow, 60 is a secondary combustion flame, and 61 is a secondary combustion flame formed around the swirl cylinder 38. Reference numeral 61 denotes a shelf board on which ceramic works are placed.

Regarding the firing furnace configured as described above,
The operation and operation will be described below. First, when a power supply (not shown) is turned on, the heater 26 is energized and the vaporizer 13 is heated. When the vaporizer 13 reaches a predetermined temperature, the vaporizer temperature is detected by the vaporizer temperature detecting section 27, and the motor 25 is operated by the instruction of the control section 28, and the impeller 21 of the blower chamber 17 is rotated to supply the combustion air. You. At the same time, the fuel supply means 8 is operated, and the fuel (kerosene, light oil, etc.)
From the rotary atomizer 11. Fuel is rotary atomization unit 1
From 1 is sprayed on the wall of the high temperature vaporizer 13 and vaporized on the wall. The combustion air is supplied into the vaporizer 13 through the vaporization air port 15, and is mixed with the vaporized fuel to be sent to the flame port 24 as a uniform combustible mixture. In addition, a part of the combustion air is supplied through the secondary air port 25 along the flame 58 in the combustion tube 23 to promote the combustion.

At this time, the flammable mixture ejected from the flame port 24 is ignited by an ignition electrode (not shown) which has previously performed a spark discharge, and a flame 58 is formed to start combustion. Thereafter, the heat of the flame 58 is sent to the furnace 29, and the temperature in the furnace 29 is measured by the temperature detection unit 42, and the ceramic work 33 is measured.
The controller 28 controls the amount of fuel supplied to the carburetor 13 and the amount of combustion air in order to adjust the temperature to a predetermined time and a predetermined temperature in the furnace 29 for performing the calcination, and the calcination is continued. The maximum firing temperature in the furnace 29 is about 1250 to 1300 ° C for main firing of ceramics and about 750 to 800 for unglazing.
° C.

Here, the amount of fuel and the amount of combustion air are controlled in order to perform the reduction firing of the pottery work 33, and if the air ratio is reduced below the stoichiometric air amount, poor combustion occurs and a large amount of carbon monoxide is generated. The carbon monoxide removes oxygen from the iron and copper oxides in the glaze, producing a color unique to reduction firing. At this time, the concentration of carbon monoxide is 2-6.
%. When the poorly burned combustion gas 59 flows into the exhaust passage 37, the secondary combustion flame swirls with fresh air that has been ejected from the swirl opening 39 of the swirl cylinder 38 from the air chamber 16 via the air passage 41 in advance. Process is performed after forming 60.

As described above, in the present embodiment, the exhaust gas processing unit 42 for inflow of swirling air and secondary combustion of the combustion gas is provided in the middle of the exhaust passage 37, and the exhaust gas processing unit 22 of the burner 10 Supply air to furnace 42
While grasping the state 9 and the state of the discharged combustion gas flow 59, the state of the exhaust gas treatment can be kept optimal, and the generation of not only smoke but also odor and carbon monoxide can be prevented.

Further, since the fuel supply means 8, the burner 10, the air blowing means 22, the furnace 29, and the internal fuel tank 44 are integrally housed in the outer casing 46, the outer wall member and the furnace lid become wet with rainwater, and Water does not penetrate into the porcelain, and the desired ceramic work can be fired.

Further, since the outer wall member and the furnace lid are covered with the exterior,
It is possible to prevent the outer wall member and the furnace lid from being corroded by being exposed to rainwater for a long time, and to withstand long-term use.

Further, since the outer wall member and the furnace lid are covered with the exterior,
Hot parts do not appear on the surface and burns can be prevented.

Further, since the fuel tank 44 is accommodated in the outer casing 46, no related articles are placed outside the firing furnace, and the workability can be improved.

Further, since a space 48 is provided between the furnace 29 and the exterior 46 and an air layer is interposed therebetween, the heat insulation effect can be improved.

Also, by providing a plurality of gulls 57 on the side portion 55 of the exterior 46, the hot air around the furnace 29 causes convection and is discharged from the gull 57 provided above the side portion 55. Fresh air is introduced into the exterior 46
Temperature can be prevented.

(Embodiment 2) FIG. 2 is a sectional view showing an exhaust gas exhaust gas treatment apparatus according to Embodiment 2 of the present invention. 2, 10 is a burner, 17 is a blower chamber, 21 is an impeller, 22
Is a blower, 28 is a control unit, 38 is a swivel cylinder, 41 is a blower passage, 42 is an exhaust gas treatment unit, 62 is a supply unit, and the supply unit 62 operates a damper or a cam with a motor or a stepping motor. 41 is configured to change the passage resistance. The difference from the first embodiment is that the exhaust gas treatment unit 42
Is a blast passage 41 communicating with the blast means 22 of the burner 10.
Is that the supply unit 62 that varies the amount of swirling air is configured in the middle of the process.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. Controlling the amount of fuel and the amount of combustion air to perform the reduction firing of the pottery work 33, when the air ratio is reduced below the theoretical air amount, causes poor combustion and generates a large amount of carbon monoxide and soot, This carbon monoxide deprives the iron and copper oxides in the glaze of oxygen, thereby producing a color unique to reduction firing. At this time, the concentration of carbon monoxide is about 2 to 6%. In addition, since it is necessary to change the ratio of the air introduced into the burner 10 and the swirl cylinder 38 depending on the intensity of the reduction, in the case of the strong reduction, the amount of combustion air sent to the burner 10 to increase the generation of carbon monoxide is The number of revolutions of the impeller 21 of the blower chamber 17 is reduced and decreased. However, as it is, the revolving cylinder 3
8, the supply unit 62 is operated in accordance with an instruction from the control unit 28 to reduce the passage resistance of the ventilation passage 41 to increase the amount of swirling air, and to increase the amount of secondary air corresponding to the increased carbon monoxide. Exhaust gas treatment is performed by promoting combustion. In the case of weak reduction, the amount of carbon monoxide is reduced more than in the case of strong reduction.
Exhaust gas treatment is performed by slightly increasing the air sent to the burner 10 and slightly decreasing the air sent to the swivel cylinder 38.

As described above, in this embodiment, the bar
In addition to the variable air amount depending on the number of revolutions of the impeller 21 of the blower means 22 of the burner 10, the supply unit 62 changes the ratio of the air amount between the burner 10 and the swivel cylinder 38 in accordance with the strength of the reduction. A large amount of air can be supplied to the exhaust gas treatment section, and the treatment capacity can be improved.

(Embodiment 3) FIG. 3 is a sectional view showing an exhaust gas treating apparatus according to Embodiment 3 of the present invention. In FIG. 3, 1
Reference numeral 0 is a burner, 37 is an exhaust passage, blower passages 41 and 38 are swirl tubes, 59 is a combustion gas flow, 60 is a secondary combustion flame, 63 is an outer wall, 64 is a holding plate, and 65 is a packing, which is different from the first embodiment. However, a part of the exhaust passage 37 is bent and the outer wall 6
The point is that the swivel cylinder 38 is inserted through 3 and communicates with the ventilation passage 41. The packing 65 is made of a heat-resistant material such as ceramic.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The exhaust passage 37 is bent, and the swirl cylinder 3
By inserting 8, the swirl cylinder 38 is disposed substantially in the center of the exhaust passage 37 along the combustion gas flow 59 so as not to disturb the flow of the combustion gas flow. Also holding plate 6
4, the packing 65 is pressed against the outer wall 63 to prevent the combustion gas flow 59 from leaking.

As described above, in this embodiment, since the swirl cylinder 38 is inserted so as not to disturb the combustion gas flow 59 in the exhaust passage 37, the combustion gas flow 59 becomes uniform, and the secondary Can promote combustion. Further, since the packing 65 is pressed against the flat portion of the outer wall 63 by the pressing plate 64, sealing can be reliably performed.

(Embodiment 4) FIG. 4 is a sectional view showing an exhaust gas treatment apparatus according to Embodiment 4 of the present invention. In FIG. 4, 3
7 is an exhaust passage, 38 is a swirl cylinder, 39 is a swirl port, 42 is an exhaust gas treatment unit, 59 is a combustion gas flow, 60 is a secondary combustion flame,
Reference numeral 66 denotes swirling air, which is different from the first embodiment in that the exhaust passage 37 is provided with a combustion gas flow 59 upstream of the exhaust gas processing unit 42.
Is provided in such a configuration that the combustion gas flow 59 is introduced into the exhaust passage 37 in a substantially tangential direction so as to turn.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The exhaust passage 37 on the upstream side of the exhaust passage 37 into which the swivel cylinder 38 is inserted.
The combustion gas flow 59 is sent in a substantially tangential direction around the swirling cylinder 38 so as to form a uniform flow with the swirling air 65 that has been jetted in the same direction. As described above, in the present embodiment, the secondary combustion flame 60 is formed evenly,
Since the next combustion is promoted, the exhaust gas treatment can be performed quietly.

(Embodiment 5) FIG. 5 is a sectional view showing an exhaust gas treatment apparatus according to Embodiment 5 of the present invention. In FIG. 5, 3
7 is an exhaust passage, 38 is a swirl cylinder, 39 is a swirl port, 42 is an exhaust gas treatment unit, 59 is a combustion gas flow, 60 is a secondary combustion flame,
67 is a through hole, 68 is a combustion support cylinder, 69 is an introduction passage, 70 is a recirculation flow, and a different point from the first embodiment is to provide a combustion support cylinder 68 having a plurality of through holes 67 around the turning cylinder 38, The point is that an introduction passage 69 for introducing the combustion gas flow 59 is provided inside the auxiliary combustion cylinder 68. In addition, the auxiliary combustion cylinder 68 and the introduction passage 69
Is made of a heat-resistant material such as ceramic.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The combustion gas flow 59 that has flowed into the exhaust passage 37 is guided from the introduction passage 69 to the auxiliary combustion cylinder 68, and is pushed by the secondary combustion flame 60 formed in the swirl cylinder 38 when discharged from the auxiliary combustion cylinder 68. The recirculation flow 70 flows again from the through hole 67 into the auxiliary combustion cylinder 68 and is sent to the secondary combustion flame 60 while maintaining the combustion gas flow 59 at a high temperature to promote the secondary combustion.

As described above, in the present embodiment, the combustion gas flow 59 is heated by the recirculation flow 70, the temperature of the combustion gas flow is increased, the secondary combustion is promoted, and the exhaust gas treatment performance can be improved. .

(Embodiment 6) FIG. 6 is a sectional view showing an exhaust gas treating apparatus according to Embodiment 6 of the present invention. In FIG. 6, 1
0 is a burner, 22 is a blower, 28 is a control unit, 38 is a swivel cylinder, 41 is a blower passage, 42 is an exhaust gas treatment unit, 43 is a temperature detection unit, and 62 is a supply unit. The point is that a predetermined amount of air always flows into the swirl cylinder 38 when the burner 10 operates and the combustion gas flow 59 is sent to the exhaust passage 37 even when the secondary combustion is not performed in the exhaust gas processing unit 42. .

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. When the reduction firing is not performed, the secondary combustion is not performed because no carbon monoxide is generated, but the high temperature combustion gas flow 59 is generated in the exhaust passage 3.
7, the supply unit 62 is operated in accordance with an instruction from the control unit 28 so as not to flow back from the swirl cylinder 38 to the burner 10 via the air passage 41, so that a small amount of the fuel other than the reduction firing such as the oxidation firing is used. This prevents the high-temperature combustion gas flow 59 from flowing out of the swirling air from the swirling cylinder 38 from flowing back to the exhaust gas treatment device. At this time, the control unit 28 checks the temperature of the temperature detection unit 43 and
To send the optimal swirling air to the exhaust passage 37. Further, since the exhaust gas treatment section 42 such as the swirl cylinder 38 is always cooled by the airflow, corrosion and deformation due to high temperature of the structure are prevented.

As described above, in the present embodiment, the backflow of the high-temperature combustion gas flow 59 can be prevented, the high-temperature corrosion and thermal deformation of the exhaust gas processing section 42 can be prevented, and the exhaust gas processing device can be prevented from being damaged.

(Embodiment 7) FIG. 6 is a sectional view showing an exhaust gas treating apparatus according to Embodiment 7 of the present invention. In FIG. 6, 1
0 is a burner, 22 is a blower, 28 is a control unit, 38 is a swivel cylinder, 41 is a blower passage, 42 is an exhaust gas treatment unit, 43 is a temperature detection unit, and 62 is a supply unit. The exhaust gas processing unit 42 controls the combustion gas flow 59 during reduction firing.
Is that the same or more air as during exhaust gas processing flows into the combustion gas stream 59 during stable combustion (oxidizing and firing, etc.) after the completion of the processing.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. When the reduction firing is not performed, the secondary combustion is not performed because no carbon monoxide is generated, but the high temperature combustion gas flow 59 during the oxidation firing is not performed.
Flows into the exhaust passage 37, and at this time, swirling air is sent from the swirl cylinder 38 to burn and remove soot attached to the inner wall of the exhaust passage 37 and the periphery of the swirl cylinder 38. At this time, the control unit 28
Controls the air supply means 22 and the supply unit 62 of the burner 10 while grasping the temperature of the temperature detection unit 43, and sends optimal swirling air to the exhaust passage 37. Here, stable combustion is
For one to two hours, the same or more air is flowed during exhaust gas treatment to promote soot removal.

As described above, in this embodiment, during the oxidizing firing (aiming operation) after the reducing firing, the exhaust passage 37 is used.
Discharge and adhesion of soot from the rotating cylinder 38 can be prevented.

(Eighth Embodiment) FIG. 7 is a sectional view showing an exhaust gas treatment apparatus according to an eighth embodiment of the present invention. In FIG. 7, 3
7 is an exhaust passage, 38 is a revolving cylinder, 42 is an exhaust gas treatment unit, 5
Reference numeral 9 denotes a combustion gas flow, reference numeral 60 denotes a secondary combustion flame, reference numeral 71 denotes a burner ring.
However, a burner ring 71 for reducing the cross-sectional area of the exhaust passage 37 is provided on the downstream side of the turning cylinder 38. The burner ring 71 is made of a heat-resistant material such as ceramics, and has an opening substantially at the center.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The combustion gas flow 59 secondary-combusted by the secondary combustion flame 60 formed in the exhaust passage 37 is converged by the burner ring 71, and the combustion gas flow 59 is retained in the exhaust passage 37 to maintain the temperature inside the exhaust passage 37. To promote secondary combustion.

As described above, in the present embodiment, the flow of the secondary combustion flame 60 and the flow of the combustion gas 59 can be made to converge to maintain a high temperature and improve the exhaust gas treatment performance. Further, when the burner ring 71 is red-heated, the radiant heat can stabilize the flame holding of the secondary combustion flame 60 and promote the secondary combustion.

(Embodiment 9) FIG. 8 is a sectional view showing an exhaust gas treatment apparatus according to Embodiment 9 of the present invention. In FIG. 8, 3
7 is an exhaust passage, 38 is a revolving cylinder, 42 is an exhaust gas treatment unit, 5
9 is a combustion gas flow, 60 is a secondary combustion flame, 72 is a flame spreader.
The point that a flame spread plate 72 larger than the outer periphery of the turning cylinder 38 is provided at the downstream end of the turning cylinder 38 is provided. The flame spread plate 72 has an inverted conical shape so that the secondary combustion flame 60 gradually spreads in the exhaust passage 37.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The secondary combustion flame 60 formed in the swirl cylinder 38 is spread in the exhaust passage 37 along the flame spread plate 72 so that the entire combustion gas flow 59 can be captured.

As described above, in this embodiment, since all of the combustion gas flow 59 is received by the secondary combustion flame 60, the secondary combustion of carbon monoxide is ensured, and the exhaust gas treatment performance can be improved.

(Embodiment 10) FIG. 9 shows Embodiment 1 of the present invention.
It is sectional drawing which shows the exhaust gas processing apparatus of No. 0. 9, 10 is a burner, 22 is a blowing means, 28 is a control unit, 3
7 is an exhaust passage, 42 is an exhaust gas treatment unit, 43 is a temperature detection unit, 59 is a combustion gas flow, 73 is an exhaust gas treatment blower,
74 is an impeller, 75 is a motor, and 76 is a ventilation passage. The difference from the first embodiment is that the exhaust gas treatment unit 42 is
The point is that air is introduced from an exhaust gas treatment blowing means 72 provided separately from the zero blowing means 22. The exhaust gas treatment blowing means 73 uses a turbo fan, a radial fan, or the like capable of generating high pressure for the impeller 74, and is configured to rotate the impeller 74 by a motor 75.

The operation and operation of the exhaust gas treatment apparatus configured as described above will be described below. The control unit 28 receives the signal from the temperature detection unit 43, changes the rotation of the motor 75 to change the impeller 74, and sends the exhaust gas processing unit 42
Is supplying air. The control unit 28 controls the combustion gas flow 5
While grasping the state of No. 9, the exhaust gas treatment state is kept optimal.

As described above, in this embodiment, an appropriate amount of air is supplied by the exhaust gas treatment blowing means 73 controlled independently of the blowing means 22 of the burner 10 in response to the state of the combustion gas. Secondary combustion can be promoted to prevent generation of not only smoke but also odor and carbon monoxide. Since the air is not divided into the burner 10 and the exhaust gas treatment section 42, the adjustment is easy and the configuration can be simplified.

[0066]

As described above, according to the present invention as set forth in claims 1 to 10, it is possible to promote 2:00 combustion during reduction firing, thereby preventing not only generation of smoke but also odor and carbon monoxide. Can be.

Further, soot adhering to the exhaust passage and the swirl cylinder can be removed by supplying swirling air during stable combustion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an exhaust gas treatment device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an exhaust gas treatment apparatus according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a firing furnace of an exhaust gas treatment apparatus according to a third embodiment of the present invention.

FIG. 4 is a sectional view showing a part of an exhaust passage of an exhaust gas treatment device according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a portion of an auxiliary combustion cylinder of an exhaust gas treatment device according to a fifth embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a part of a swirl cylinder of an exhaust gas treatment apparatus according to Embodiments 6 and 7 of the present invention.

FIG. 7 is a cross-sectional view showing burner ring of an exhaust gas treatment apparatus according to Embodiment 8 of the present invention.

FIG. 8 is a sectional view showing a flame spreader of an exhaust gas treatment apparatus according to a ninth embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating an exhaust gas treatment blower of an exhaust gas treatment apparatus according to a tenth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a conventional exhaust gas treatment device.

[Explanation of symbols]

 Reference Signs List 10 burner 22 blowing means 37 exhaust passage 42 exhaust gas treatment unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiro Ogino 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Terms (reference) 3K023 KA05 KB01 KC02 KD08 3K070 DA06 DA07 DA52 DA74 3K078 BA09 BA21 CA04 CA13 CA17

Claims (10)

[Claims] 1. An exhaust passage for exhausting combustion gas from a burner, an exhaust gas treatment unit provided in the middle of the exhaust passage for injecting swirling air to perform secondary combustion of the combustion gas, and an exhaust gas treatment unit for blowing exhaust gas from the blowing means of the burner. An exhaust gas treatment device that supplies air to the section. 2. The exhaust gas treatment unit according to claim 1, wherein the exhaust gas treatment unit is provided with a supply unit that varies an amount of swirling air in a ventilation passage communicating with the ventilation unit of the burner. 3. The exhaust gas treatment apparatus according to claim 1, wherein the exhaust passage is formed by bending a part of the passage, inserting a swirl cylinder through an outer wall, and communicating with the ventilation passage. 4. The exhaust gas treatment device according to claim 1, wherein the exhaust gas passage introduces the combustion gas into the exhaust gas passage in a substantially tangential direction so that the combustion gas swirls upstream of the exhaust gas treatment section. 5. The exhaust gas treating section according to claim 1, wherein an auxiliary combustion cylinder having a plurality of through holes is provided around the swirling cylinder, and a combustion gas is introduced inside the auxiliary combustion cylinder. An exhaust gas treatment device according to item 1. 6. The exhaust gas treatment apparatus according to claim 1, wherein the exhaust gas treatment section constantly flows a predetermined amount of air. 7. The exhaust gas processing unit according to claim 1, wherein the same or more air as that during the processing is introduced into the combustion gas at the time of stable combustion after the processing of the combustion gas in the combustion furnace is completed. An exhaust gas treatment apparatus according to claim 1. 8. The exhaust gas treatment device according to claim 1, wherein the exhaust gas treatment unit is provided with a burner ring on the downstream side of the swirl cylinder to reduce a sectional area of the exhaust passage. 9. The exhaust gas treating apparatus according to claim 1, wherein the exhaust gas treating section is provided with a flame spread plate larger than the outer periphery of the swirling cylinder at an end on the downstream side of the swirling cylinder. 10. The exhaust gas treatment apparatus according to claim 1, wherein the exhaust gas treatment section is configured to introduce air from an exhaust gas treatment air supply unit provided separately from the burner air supply unit.